The eye-catching domes, which are the newest additions to Amazon’s downtown campus, are between 80 and 95 feet high and feature five floors of office space. There are no enclosed offices, conference spaces or desks. Company officials said the idea was to create an urban oasis for employees to work and socialize in.

We are in the press area getting ready for the grand opening of Amazon’s Spheres. We are surrounded by 40,000 plants from around the world. You can feel the humidity as soon as you walk in but it’s starting to cool down. More pix &video coming up on @KIRO7Seattlepic.twitter.com/DCYsdgGxxM

The project has garnered interest since it was launched -- not just because of how the structures look, but because of the jungle that is housed inside.

More than 40,000 plants from more than 30 countries were brought in to fill the domes, which are the newest additions to Amazon's downtown campus. Amazon is paying a full-time horticulturalist to tend to exotic plants and trees and to be a resource to the public as well.